145 Upcoming 5K Races Near Boulder, CO

Diplo's Run Club Denver

Denver, CO

Sunday, July 12th, 2026

Featured

Code:FTR10

View details for race Diplo's Run Club Denver

Let Freedom Run 5k - LONGMONT

Longmont, CO

Saturday, July 4th, 2026

View details for race Let Freedom Run 5k - LONGMONT

6th Annual July 4th ROCK-IT RUN

Castle Rock, CO

Saturday, July 4th, 2026

Half

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HRCA Independence Day 5K

Littleton, CO

Saturday, July 4th, 2026

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FireKracker 5k

Fort Collins, CO

Saturday, July 4th, 2026

1 Mile

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Loveland Liberty 5K

Loveland, CO

Saturday, July 4th, 2026

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Let Freedom Run 5k/10k - Louisville

Louisville, CO

Saturday, July 4th, 2026

10K

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Greeley Freedom 5k Walk & Run

Greeley, CO

Saturday, July 4th, 2026

View details for race Greeley Freedom 5k Walk & Run

BRR All-Comers Summer Track & Field Series #3

Boulder, CO

Thursday, July 9th, 2026

1 Mile

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DRMABPsi 1–5K Walk, Run & Roll

Denver, CO

Saturday, July 11th, 2026

View details for race DRMABPsi 1–5K Walk, Run & Roll

Heatwave Half Marathon - Denver

Denver, CO

Saturday, July 11th, 2026

1 Mile

10K

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Heatwave Half Marathon - Denver

Littleton, CO

Saturday, July 11th, 2026

1 Mile

10K

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Cookie Chase

Denver, CO

Saturday, July 11th, 2026

Fast

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All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half

10K

Trail

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Heritage Eagles 5K

Littleton, CO

Saturday, July 18th, 2026

Fast

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Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, CO

Saturday, July 18th, 2026

Half

10K

Trail

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CU Anschutz Run Club 5K

Aurora, CO

Saturday, July 18th, 2026

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One Is Too Many: Veteran Suicide Awareness 5k a...

Greeley, CO

Sunday, July 19th, 2026

1 Mile

View details for race One Is Too Many: Veteran Suicide Awareness 5k and Kids Run

Flyin' Ryan Memorial 5k

Loveland, CO

Friday, July 24th, 2026

Fast

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The Hero's Journey 5K

Aurora, CO

Saturday, July 25th, 2026

Trail

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Spirit of the West 5K Run/Walk

Golden, CO

Sunday, July 26th, 2026

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Unicorn 5k (South)

Highlands Ranch, CO

Saturday, August 1st, 2026

View details for race Unicorn 5k (South)

Move with MADD Denver 5K

Denver, CO

Saturday, August 1st, 2026

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Move with MADD Denver 5k and Walk

Denver, CO

Saturday, August 1st, 2026

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12th Annual Run for the Ring

Aurora, CO

Saturday, August 1st, 2026

Trail

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Eltuck Valley 5K - Lory Summer Trail Series

Fort Collins, CO

Tuesday, August 4th, 2026

Trail

Fast

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Choice City Running Festival

Fort Collins, CO

Friday, August 7th, 2026

1 Mile

Half

10K

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RMRR August Trophy Series

Centennial, CO

Friday, August 7th, 2026

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Arapahoe Warrior 5K

Centennial, CO

Saturday, August 8th, 2026

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Summer Sizzler- Denver

Thornton, CO

Saturday, August 8th, 2026

1 Mile

10K

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All-Out Runapalooza

Arvada, CO

Saturday, August 8th, 2026

Half

10K

Trail

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Summer Sizzler- Denver

Denver, CO

Saturday, August 8th, 2026

1 Mile

10K

View details for race Summer Sizzler- Denver

The Bullfrog Summer Surge

Lakewood, CO

Sunday, August 9th, 2026

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Pancake Stampede 5K

Littleton, CO

Sunday, August 9th, 2026

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Miles for Migraine Colorado

Denver, CO

Saturday, August 15th, 2026

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Sunrise Stampede

Longmont, CO

Saturday, August 15th, 2026

1 Mile

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Frontier Academy Community 5K

Greeley, CO

Saturday, August 15th, 2026

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Erie Half & 5k

Erie, CO

Sunday, August 16th, 2026

Half

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Cancer League of Colorado Race 4 Research

Denver, CO

Sunday, August 16th, 2026

View details for race Cancer League of Colorado Race 4 Research

Into the Hills Eltuck 5k

Bellvue, CO

Tuesday, August 18th, 2026

Trail

Fast

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Ram Run

Denver, CO

Saturday, August 22nd, 2026

1 Mile

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Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Saturday, August 22nd, 2026

Half

Trail

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Coyote Chase 5k

Louisville, CO

Saturday, August 22nd, 2026

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2026 True Impact Ministries 5K/10K

Centennial, CO

Saturday, August 22nd, 2026

10K

Trail

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Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Sunday, August 23rd, 2026

Half

10K

View details for race Pioneer Prairie Dog Half, 10k & 5k

Rebel Run 5k

Denver, CO

Sunday, August 23rd, 2026

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Glow & Roll: Illuminate What's Possible

Littleton, CO

Saturday, August 29th, 2026

1 Mile

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Run Like the Wind 5k / 2k / Dog Jog

Allenspark, CO

Saturday, August 29th, 2026

View details for race Run Like the Wind 5k / 2k / Dog Jog

RexRun For PAWSitivity 2026 Trail Run/Walk

Aurora, CO

Saturday, August 29th, 2026

1 Mile

Trail

View details for race RexRun For PAWSitivity 2026 Trail Run/Walk

Golden Harvest Half Marathon & 5k/10k - Denver

Denver, CO

Saturday, September 5th, 2026

1 Mile

10K

View details for race Golden Harvest Half Marathon & 5k/10k - Denver

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